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Driving on a bad cylinder
p12:
Driving a vehicle with a catalytic converter and an engine misfire is not good.
If driven for very long it will damage the converter.
Excessive raw fuel in the exhaust can under the proper conditions overheat the converter and be a fire hazard.
Nick1911:
These statements are true, in particular p12's. Converters are expensive to replace!
If your car has ignition wires, change them. They are the great weak point of the modern engine, IMO.
By messing with them to change the plugs, you may have caused cracks in the insulation of the #6 plug wire. Cracked insulation doesn't let low voltage leak, but high voltage certainly will.
French G.:
What made 4 of the 6 cylinders misfire originally? I know you said new plugs cleared it up, but did the plugs have help going bad? As in bad O2 sensor feeding a rich mixture, oil blow-by, coolant leak into the cylinder? I suppose the plugs could have just been bad from long use but I feel like there is an underlying issue.
ThrottleJockey:
Is the gas cap on the drivers side or the passenger side? This will often tell you where the car was built, drivers side=USA. If the cap is on the passenger side it was likely built in Japan and this is the problem, as the Japanese built cars are made from sub standard, recycled pot metal. In the latter case, you will have trouble for the life of the car(or as long as you own it). It is unlikely that a sensor would be bad without a code coming up. It is more likely an issue with a plug wire, coil pack, improperly installed or torqued plug, improper plug gap, injector fail, or warped cylinder head/bent valve. These problems while minor are often costly to repair, as the only way to diagnose is to just keep throwing money at it until you get the right thing. I prefer to keep my cars in the following guideline. K.I.S.S., Keep It Simple Stupid. My cars are often older, and all mechanical. Very simple to diagnose and repair, cheap too. And for the same price of a new car, you can buy and completely restore an older one often with money left over for new guns!
Gewehr98:
--- Quote ---If the cap is on the passenger side it was likely built in Japan and this is the problem, as the Japanese built cars are made from sub standard, recycled pot metal. In the latter case, you will have trouble for the life of the car(or as long as you own it).
--- End quote ---
Oh, really? ;/
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